Construction of two mixed-ligand coordination polymers presenting unusual polyrotaxane-like entanglements

•Two novel coordination polymers have been synthesized and characterized.•Compound 1 features a 2D → 3D polyrotaxane array by the interlock of bilayer networks.•Compound 2 exhibits an unusual 3D polyrotaxane-like self-threading framework.

Two novel polyrotaxane-like coordination polymers, [Ni4(L)4(H2O)3(bpp)4]·3H2O (1) and [Cd4(L)4(bpp)3]·3H2O (2) (H2L = Me2Si(p-C6H4COOH)2, bpp = 1,3-bis(4-pyridyl)propane), have been synthesized and structurally characterized. Compound 1 features a 2D → 3D polyrotaxane array by the interlock of bilayer networks. Compound 2 exhibits an unusual 3D polyrotaxane-like self-threading framework. In addition, compound 2 shows an emission at 485 nm when it was excitated at 400 nm.

Graphical abstractTwo novel polyrotaxane-like coordination polymers, [Ni4(L)4(H2O)3(bpp)4]·3H2O (1) and [Cd4(L)4(bpp)3]·3H2O (2) (H2L = Me2Si(p-C6H4COOH)2, bpp = 1,3-bis(4-pyridyl)propane), have been synthesized and structurally characterized. Compound 1 features a 2D → 3D polyrotaxane array by the interlock of bilayer networks. Compound 2 exhibits an unusual 3D polyrotaxane-like self-threading framework.Figure optionsDownload full-size imageDownload as PowerPoint slide